4-inch race downpipe without a catalyst for BMW 4-cylinder N20 engines in 2, 3, 4 and 5 Series models. Removing the factory catalyst improves exhaust gas flow, reduces back pressure and enables faster turbocharger spool-up.
Combined with Stage 2 software, the vehicle can gain 25–35 hp, depending on the fuel octane rating. The exhaust note becomes more pronounced and sportier, while engine responsiveness improves.
Features
- 4-inch design
- CNC-machined flange and bracket for direct fitment
- Stainless steel construction with TIG welding
- Expected power increase of 25–35 hp with Stage 2 software, depending on the fuel octane rating
- More pronounced, sportier exhaust note
- Weight: 6.80 kg
Suitable Bootmod3 software optimisation or Stage 2 software is required to remove the check engine light (CEL) and ensure correct operation.
Important: This product is intended exclusively for racing or off-road use and is not intended for use on public roads. It is not road-legal in the EU. Not suitable for N26 engines. Check the engine on the sticker beneath the bonnet: the N20 engine is marked ULEV, while the N26 engine is marked SULEV. Before installation, also check the downpipe flange on the vehicle.
Suitable for: BMW 2 I (F22/F23/F45/F46/F87), BMW 3 VI (F30/F31/F34/F80), BMW 4 I (F32/F33/F36/F82/F83), BMW 5 VI (F10/F11).
Approval
This part has no TÜV certification (ABE, TTG or Teilegutachten).
Compatible vehicles (manufacturer data)
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| BMW 228i | — | 2014–2016 | — |
| BMW 328i | — | 2011–2016 | — |
| BMW 428i | — | 2014–2016 | — |
| BMW 528i | — | 2011–2016 | — |
Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us — we will check for you.
Reviews
There are no reviews yet.